/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraEffectType.h
Simple linear ramp to drive scaling values. TODO: Replace with Curve that can baked down for fast eval and has good inline UI widgets.
[USTRUCT](Programming/UnrealArchitecture/Reference/Structs)() struct FNiagaraLinearRamp
float
EndX
float
EndY
float
StartX
float
StartY